Originally Posted By: bluezone
Originally Posted By: Formermac
What happens if the batteries are proven to be good?

some brands of thermostat are known to be unreliable

unmount the thermostat from the wall and then connect the two wires going to the furnace or use a jumper

if the furnace activates then the thermostat has failed

the older mercury thermostats were far more reliable than the newer non-mercury ones

Originally Posted By: Formermac
a thermostat is wired to 24 volts DC and the batteries are solely for the benefit of maintaining your preset programs.


the 24 volts only runs thru the thermostat to activate the relay in the furnace

the batteries operate the micro electronics functions of the thermostat as the mercury switch has been removed

ROTFLMAO, I thought that at least you even Google it, somewhat basic laymen term but what you post is hilarious. I see you as someone that talks with the doctor just prior to going under anesthesia and tell the physician where and how to make the incision. Keep responding because I'm stir crazy today and need a little entertainment.
I know how to bring out the buffoonery of A Trump supporter.State Fact